Subtract 6/10 from 20/21
20/21 - 6/10 is 37/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 10 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,
20/21 = 20 × 10/21 × 10 = 200/210 - Likewise, for the 2nd fraction, since 10 × 21 = 210,
6/10 = 6 × 21/10 × 21 = 126/210 - Subtract the two like fractions:
200/210 - 126/210 = 200 - 126/210 = 74/210 - After reducing the fraction, the answer is 37/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/21-6/10 20/21-12/10 20/42-6/10 20/21-6/20 60/21-6/10 20/21-18/10 20/63-6/10 20/21-6/30 20/21-30/10 20/21-6/50 20/21-42/10 20/21-6/70